Approved & therapeutic
Thymosin Alpha-1
Tα1 / Zadaxin
A peptide naturally produced by the thymus gland that plays a critical role in immune system maturation and function. Used in over 30 countries for immune support.
Also known as: Thymalfasin, Zadaxin
- Status
- Thymosin Alpha-1 is approved in at least one country outside the U.S. but not approved by the FDA.
- Evidence
- Approved labeling. Official prescribing information exists, based on clinical trials in people.
- Half-life
- ~2 hours
- How it's taken
- Subcutaneous injection
- Mechanism
- Immune modulation
- Pathways
- Thymic Immune
How Thymosin Alpha-1 works
Enhances the function of dendritic cells and T-cells — key components of your immune system. Helps your body identify and respond to infections, and may improve vaccine effectiveness.
What research has looked at
- Enhanced immune system function
- Improved T-cell activity
- Better response to infections
- May support hepatitis B/C treatment
- Used alongside cancer immunotherapy in some countries
Evidence level: Approved labeling. Official prescribing information exists, based on clinical trials in people. These are areas studied or reported, not promised effects.
Reported side effects and risks
- Generally very well-tolerated
- Injection site redness
- Mild fatigue
- Rare allergic reactions
- Approved in many countries but not FDA-approved in US
Sources
- PubMed research on thymalfasin thymosin alpha-1 immune modulation · NIH · National Library of Medicine
- DrugBank record for thymalfasin · DrugBank
- Active clinical trials for thymosin alpha 1 · U.S. National Library of Medicine
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Related compounds
Thymosin Alpha-1 FAQ
What is Thymosin Alpha-1?
A peptide naturally produced by the thymus gland that plays a critical role in immune system maturation and function. Used in over 30 countries for immune support.
How does Thymosin Alpha-1 work?
Enhances the function of dendritic cells and T-cells — key components of your immune system. Helps your body identify and respond to infections, and may improve vaccine effectiveness.
Is Thymosin Alpha-1 FDA approved?
No. Thymosin Alpha-1 is approved in at least one country outside the U.S. but not approved by the FDA. Evidence level: approved labeling. Official prescribing information exists, based on clinical trials in people.
What is the half-life of Thymosin Alpha-1?
Reported half-life: ~2 hours.
How is Thymosin Alpha-1 taken?
Subcutaneous injection.
What side effects have been reported with Thymosin Alpha-1?
Reported in the sources: Generally very well-tolerated; Injection site redness; Mild fatigue; Rare allergic reactions; Approved in many countries but not FDA-approved in US.
Educational summary compiled from the sources listed above. Not medical advice. Peptide Vault does not sell, source or recommend any compound. Talk to a qualified clinician before starting or changing anything.